表格行显示/隐藏*没有*列宽调整大小，带表格列表：自动

Question

I have table with multiple rows, showing items for sale. When the user clicks on a row, a Javascript inserts / shows a new row right beneath it with details about the item. The issue is when the description is long, it forces the column widths to readjust / resize. This shifts the columns positions and is really annoying, especially for the user. Right now, I have my table.style.tableLayout: auto. I actually prefer it this way, because the columns are adjusted to the content.

My question is: how do I dynamically "lock" the widths of the columns in my table so that when I insert / show the new row, the columns do not readjust / resize?

I've tried:

1. dynamically setting the table to temporarily "tableLayout: fixed"
2. inserting / showing my new row
3. changing the table back to "tableLayout: auto"

Actions 1 & 2 works in in FireFox, but not in Safari and IE (6 & 7). However, doing all three seems to prevent the columns from shifting too much.

The frustration is unbearable ... loosing lots of sleep ... please help!

Thanks.

Answer 1

For those looking for the code (this is done in jQuery). This also assumes the first row has the proper widths for each cell. Pretty easy changes if needed.

$('table.class_of_table_to_fix tr:first td').each(function() {
   $(this).css({'width': $(this).width()+"px"});
});

Answer 2

I would set a percent width on each column simply as a guide. Set it just once on the TH of each column. The browser will still adjust the columns to content if necessary, but the columns will stay in place more consistently.

Next, I would never put css "white-space:nowrap" anywhere on that table. A long description should not break the table layout, it should wrap around properly on multiple lines, and be readable if you set the widths on each column to suit the type of data. Similarly I would keep the use of (non breakable spaces) to dates, times and numbers and allow the text to wrap.

Other than that, I do this at my job on a dialy basis, and there's a time when you need to stop ulling hairs asking the browser to do something it's not designed to do. Content should flow and adapt. Locking column widths to pixels is 99.99999% of the time a bad idea.

PS: If you really, reeally, REALLY need to lock columns, the only solution I'm aware of that works with CSS2 and accross all browsers is to use images. You could insert a 1px high transparent gif image in each column, and counting in the padding of the cells (TD), set a pixel width on each image (IMG), instead of on the columns (TH/TD). You could hide those in the TH for example. You can leave the images at 1 pixel wide and set percent widths on TDs, and when you open a new row, you would get each column width minus TD Padding, and set that to the corresponding IMG. I haven't tried! I just know that in many projects I've worked on, I've used small gif images to lock a minimum vertical spacing between columns, for example.

Answer 3

I had a similar problem when I was implementing a table with groups that could be toggled. I wanted the initial ratio between the columns to stay the same without fixing the widths of the columns. By default the browser would change the widths depending on the visibility of the table's rows, which was undesirable.

I went ahead and followed @faB's suggestion of applying percentages, but doing so using a small script that would calculate the percentages of the th elements and apply them after the initial render. This made my columns stay the same width, even with all rows hidden.

Here's the script, which uses jQuery:

(function($){

    var lock_widths = function() {
        var total_width = $('table').innerWidth();
        var headers = $('table th');
        var leftover = 100;

        $.each(headers, function(ix, el) {
            var header = $(el), width;

            // on the last call use the leftover percentage
            if (ix == headers.length - 1) {
                width = leftover;
            } else {
                leftover -= width = header.outerWidth() / total_width * 100; 
            }

            header.css({'width': width + '%'});
        });
    };

    $(document).ready(lock_widths);

})(jQuery);

Tested in IE7+, Firefox and Chrome. This works for my special case because I have header columns as a reference, but it could be rewritten to measure some other columns.

Answer 4

You can display the details of the row beneath the clicked one in DIV and set its

style="overflow:auto";

so that details will wrap and scrollbar will be available to display entire text.

Answer 5

I don´t know if you´re familiar with jquery, but that´s what I would use - in combination with a separate class for the column that´s causing resizing in the new row - to:

1. Calculate / get the with of the column
2. Set the with of the afore mentioned class
3. Add the row

I haven´t tried it, but that should do it.

By the way, there are probably other ways to do it, I´m just more familiar with jquery (for point 1. and 2.).